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ASTM 800, Ferrite content (CF8M)

ASTM 800, Ferrite content (CF8M)

ASTM 800, Ferrite content (CF8M)

(OP)
Three questions:

1. If have worked our the "Volume percent Ferrite" of material ASTM A351 Gr CF8M according to ASTM A800 at 16%. Is there a method of transfering this percentage into a Ferrite number according to ASTM A800? FN?

2. What is the minimum Ferrite percent / FN number possible using the calculation within ASTM A800? for ASTM A351 Gr CF8M?

3. Is it possible to have a ferrite content of 8% or less for ASTM A351 Gr CF8M using the calculation within ASTM A800?

Thanks for any help

RE: ASTM 800, Ferrite content (CF8M)

Answer 1) No

Answer 2) 0% ferrite percent.

Answer 3) Yes, see answer 2).

Regarding 2) and 3), you need to know the niobium and nitrogen content of your steel before you carry out the calculation.

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